Abstract 11817: The Effect of Time to Treatment With Antiarrhythmic Drugs on Return of Spontaneous Circulation in Shock Refractory Out-of-Hospital Cardiac Arrest: A Secondary Analysis of the ALPS Randomized Controlled Trial
Bibliographic record
Abstract
Purpose: The effects of amiodarone and lidocaine on the return of spontaneous circulation (ROSC), relative to time to treatment in out of hospital cardiac arrest (OHCA) patients is unknown. We conducted a post-hoc analysis of the Resuscitation Outcomes Consortium Amiodarone, Lidocaine, Placebo (ROC ALPS) randomized trial examining the association of time to treatment with ROSC at emergency department (ED) arrival. Method: In the ROC ALPS trial, adults with non-traumatic OHCA with initial VF/pVT after ≥ 1 shock were randomized to receive amiodarone, lidocaine or placebo. We used logistic regression to examine the association of time to treatment (911 call to study drug administration interval) with ROSC at ED arrival. Results: Overall, 1112 (36.7%) patients had ROSC at ED arrival. Time to treatment data were available for 2994 (99%) of the patients. The proportion of patients with ROSC at ED arrival decreased as time to drug administration increased, in amiodarone (OR 0.92, 95% CI 0.90-0.94 per min increase), lidocaine (OR 0.95, 95% CI: 0.93-0.96) and placebo (OR 0.95, 95% CI: 0.93-0.96) arms. The odds of ROSC at ED in the amiodarone group (versus placebo) changed in relation to the time of drug administration (OR 0.96, 95% CI: 0.93-0.99). With short times to drug administration, ROSC was higher in amiodarone versus placebo recipients, whereas ROSC was higher with placebo at later times. Comparing lidocaine to placebo, ROSC rate increased at all times (OR 1.29, 95% CI: 1.07-1.59); there was no time to drug administration effect (OR 1.00, 95% CI: 0.97-1.03). Among all patients, survival at hospital discharge was 21.0%, 24.4%, and 23.7% for placebo, amiodarone and lidocaine respectively. Conclusion: Amiodarone’s efficacy in restoring ROSC declined with longer duration of arrest, potentially due to its adverse hemodynamic effects. Overall, amiodarone and lidocaine had similar effects on mortality; in this study, ROSC at ED arrival trend did not reflect the overall survival rate
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.004 | 0.010 |
| Meta-epidemiology (narrow) | 0.002 | 0.000 |
| Meta-epidemiology (broad) | 0.005 | 0.007 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.003 |
| Insufficient payload (model declined to judge) | 0.017 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".